Is this it?

Dick Cheney's office paid a contractor (Mitchell Wade) $140,000, even though he never held a federal contract before. Wade then paid exactly $140,000 in a Cashier's Check to buy a boat for Duke Cunningham. (Remember him? The Republican Congressman who was nailed for accepting bribes from Wade in exchange for defense contracts?) One of the fired attorneys, Carol Lam, was the one who put both Cunningham and Wade in jail.

Could that be why she was fired? Was she also investigating Cheney's role in the Cunningham scandal?